    /* 页面整体样式设置 */
body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
}
/* 页面标题样式设置 */
h1 {
    text-align: center;
    color: #333;
}
/* 列表样式设置 */
ul {
    list-style-type: none;
    padding: 0;
    max-width: 600px;
    margin: 20px auto;
    background: white;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}
/* 列表项样式设置 */
li {
    padding: 15px;
    border-bottom: 1px solid #ddd;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
/* 去除最后一个列表项的下边框 */
li:last-child {
    border-bottom: none;
}
/* 按钮样式设置 */
button {
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    padding: 8px 12px;
    cursor: pointer;
    transition: background-color 0.3s;
}
/* 按钮悬停效果 */
button:hover {
    background-color: #0056b3;
}
/* 输入框样式设置 */
input[type="text"] {
    padding: 10px;
    width: calc(100% / 3);
    border: 2px solid #ccc;
    border-radius: 5px;
    margin-right: 10px;
    border-color: #007BFF;
}
/* 输入框内容容器样式设置 */
.input-content {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}
/* 模态框样式设置 */
.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0, 0, 0);
    background-color: rgba(0, 0, 0, 0.4);
    padding-top: 60px;
}
/* 模态框内容样式设置 */
.modal-content {
    background-color: #fefefe;
    margin: 5% auto;
    padding: 20px;
    border: 1px solid #888;
    width: calc(100% / 3);
    text-align: center;
    border-radius: 12px;
}
/* 关闭按钮样式设置 */
.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}
/* 关闭按钮悬停和聚焦效果 */
.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
    cursor: pointer;
}